private void InputPaneHiding(InputPane sender, InputPaneVisibilityEventArgs e)
{
if (displacement != 0.0)
{
MoveMiddleOnShowing.Stop();
// Keep in mind that other elements could be shifting out of your control. The sticky app bar, for example
// will move on its own. You should make sure the input element doesn't get occluded by the bar
bottomOfList = MiddleScroller.VerticalOffset + MiddleScroller.ActualHeight;
// If the middle area has actually completed resize, then we want to ignore
// the default system behavior
if (resized)
{
// Be careful with this property. Once it has been set, the framework will not change
// any layouts in response to the keyboard coming up
e.EnsuredFocusedElementInView = true;
}
// If the container has already been resized, it should be sized back to the right size
// Otherwise, there's no need to change the height
if (Double.IsNaN((double)Container.GetValue(Grid.HeightProperty)))
{
MoveMiddleOnHiding.Begin();
}
else
{
shouldResize = ResizeType.ResizeFromHide;
Container.ClearValue(Grid.HeightProperty);
}
}
}
private void MiddleScroller_SizeChanged(object sender, SizeChangedEventArgs e)
{
// Scrolling should occur after the scrollable element has been resized to ensure
// that the items the user was looking at remain in view
if (shouldResize == ResizeType.ResizeFromShow)
{
resized = true;
shouldResize = ResizeType.NoResize;
MiddleScroller.ChangeView(null, bottomOfList - MiddleScroller.ActualHeight, null, true);
}
else if (shouldResize == ResizeType.ResizeFromHide)
{
shouldResize = ResizeType.NoResize;
MiddleTranslate.Y = displacement;
MiddleScroller.ChangeView(null, bottomOfList - MiddleScroller.ActualHeight, null, true);
displacement = 0;
resized = false;
MoveMiddleOnHiding.Begin();
}
}